U.S. not sole country to blast off on space discovery

The U.S. will have to work harder to maintain its dominance in space if it wants to stay competitive -- especially with more stringent defense budgets. More recently, China, Iran and North Korea are developing space capabilities. One watchdog group says increased oversight and a transparent budget are needed. Vice Adm. Carl Mauney, deputy commander of U.S. Strategic Command, says the U.S. should collaborate with other countries to improve their space platforms.